from flask import render_template, current_app, session, request, jsonify, g

from info import constants
from info import redis_store
from info.models import User, News, Category
from info.utils.response_code import RET
from info.utils.common import user_login_data
from . import index_blu


@index_blu.route('/news_list')
def news_list():
    """
    获取首页新闻数据
    :return:
    """
    # 1、获取参数
    # 新闻的分类cid
    cid = request.args.get('cid', '1')
    page = request.args.get('page', '1')
    per_page = request.args.get('per_page', '10')

    # 2、校验参数
    try:
        cid = int(cid)
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(erron=RET.PARAMERR, errmsg='参数错误')

    filters = []
    # 如果查询的不是最新分类的数据
    if cid != 1:
        filters.append(News.category_id == cid)

    # 查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(RET.DBERR, errmsg='数据查询错误')

    # 取到当前页的数据
    # 模型对象列表
    news_model_list = paginate.items
    total_page = paginate.pages
    current_page = paginate.page

    # 将模型对象列表转化为字典列表
    news_list_dict = []
    for news in news_model_list:
        news_list_dict.append(news.to_basic_dict())

    data = {
        'total_page': total_page,
        'current_page': current_page,
        'news_list_dict': news_list_dict
    }

    return jsonify(erron=RET.OK, errmsg='ok', data=data)


@index_blu.route('/')
@user_login_data
def index():
    """
    显示首页
    如果用户已经登录，将当前登录的用户数据传到模版中，供模版显示
    :return:
    """
    # 显示用户是否登录的逻辑
    # 取到用户的id
    # user_id = session.get('user_id', None)
    # user = None
    # if user_id:
    #     # 尝试查询用户模型
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)
    user = g.user
    # 右侧新闻点击排行逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
        # print(news_list)
    except Exception as e:
        current_app.logger.error(e)
    # 定义一个空字典列表，里面装的就是字典
    news_list_dict = []
    # 遍历对象，将对象的字典添加到字典列表中
    for news in news_list:
        news_list_dict.append(news.to_basic_dict())

    # 查询分类数据，通过模版的形式渲染出来
    categories = Category.query.all()

    categories_list = []
    for category in categories:
        categories_list.append(category.to_dict())

    data = {
        'user': user.to_dict() if user else None,
        'news_list_dict': news_list_dict,
        'categories_list': categories_list
    }

    return render_template('news/index.html', data=data)


@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')
